42 Design and development of and scientific research, testing and analysis relating to solar power plants, solar powered machines, solar power generation systems, solar power collection systems, turbines, solar powered turbines, turbines for power generation, vertical axis turbines and other vertical axis machines, horizontal axis turbines and other horizontal axis machines, solar power propulsion systems except for land vehicles, solar thermal installations, and components, parts and fittings therefor; technical services related to the design, development and operation of solar power plants, solar powered machines, solar power generation systems, solar power collection systems, turbines, solar powered turbines, turbines for power generation, vertical axis turbines and other vertical axis machines, horizontal axis turbines and other horizontal axis machines, solar power propulsion systems except for land vehicles, solar thermal installations and components, parts and fittings therefor; advisory, consultancy and information services relating to all the aforesaid services